Another site:
AllTop 200 most popular tests to learn English...
1) Test de niveau anglais (webmaster) 6 770 286
2) Placement test : grammar for beginners (lucile83) 5 978 321
3) A/AN (webmaster) 5 356 279
4) Auxiliary BE (webmaster) 3 219 994
5) Present continuous (webmaster) 2 993 386
6) Present simple (webmaster) 2 895 838
7) Present simple (webmaster) 2 592 100
8) Present continuous (webmaster) 2 422 921
9) Adjectives (webmaster) 2 090 909
10) A/an (anonyme) 2 010 431
11) Present perfect simple (webmaster) 1 634 150
12) Vocabulary - Placement test (bridg) 1 616 978
13) Preterite (webmaster) 1 613 686
14) Short placement test (webmaster) 1 441 479
15) Preterite (webmaster) 1 438 845
16) To be (bridg) 1 403 195
17) What time is it? (webmaster) 1 346 259
18) Present perfect (webmaster) 1 338 138
19) The alphabet in English (webmaster) 1 318 527
20) Adjectives (lucile83) 1 213 063
21) What time is it? (webmaster) 1 203 406
22) Numbers (webmaster) 1 187 009
23) 'A' ou 'An' (anonyme) 1 171 535
24) Two presents: present continuous, present simple (webmaster) 1 145 612
25) To be (bridg) 1 143 288
26) Comparatives / Superlatives (webmaster) 1 094 564
27) Numbers (webmaster) 1 068 139
28) CAN / MUST (webmaster) 1 056 803
29) THE/ A / AN / nothing (webmaster) 1 028 545
30) Comparatives (webmaster) 1 005 378
31) Family life (bridg) 998 520
32) Numbers > 100 (webmaster) 984 832
33) Future (going to/will/present continuous) (anonyme) 960 183
34) Plural (webmaster) 953 794
35) Superlatives (webmaster) 873 035
36) Adjectives (anonyme) 872 765
37) Simple present (bridg) 851 569
38) Spelled words N°1 (bridg) 848 152
39) Placement test beginners: Check your spelling (lucile83) 829 178
40) Introducing oneself (webmaster) 825 987
41) Adverbs of frequency (lucile83) 813 943
42) Family (bridg) 782 921
43) General test-End of high school / Beginning of university (webmaster) 780 675
44) Frequency adverbs (webmaster) 776 266
45) Present simple (lucile83) 776 005
46) Present BE + Ving (bridg) 762 639
47) Genitive (webmaster) 722 015
48) Family tree (anonyme) 717 800
49) Preterite: simple or continuous? (webmaster) 713 985
50) Passive form (lucile83) 708 778
51) Placement test (beginners) (lili73) 699 077
52) Past simple or present perfect (lucile83) 689 649
53) Future (webmaster) 674 715
54) 2 Preterites (webmaster) 659 546
55) Present perfect simple (bridg) 655 546
56) Preterite (webmaster) 617 024
57) List of 200 irregular verbs and audio (bridg) 614 043
58) Modals (webmaster) 611 577
59) Spelled words N°2 (bridg) 607 676
60) Height (webmaster) 605 361
61) Modals (webmaster) 601 486
62) Articles a / an / the (lucile83) 596 697
63) Plural forms (bridg) 575 724
64) Nationalities (webmaster) 573 031
65) Past continuous / Past simple (anonyme) 559 765
66) Irregular plurals (bridg) 552 117
67) Two presents: simple and continuous (webmaster) 548 104
68) Preterite (bridg) 547 308
69) Vocabulary: greeting people (here4u) 536 345
70) Superlatives (frapedur) 533 146
71) Give your opinion (bridg) 530 541
72) Adverbs of Frequency (bridg) 515 899
73) Present simple or continuous (lucile83) 505 601
74) Present perfect / preterite ? (anonyme) 504 641
75) Possessive case (anonyme) 479 376
76) Countries & nationalities (bridg) 471 828
77) 'The' or nothing? (webmaster) 470 271
78) Introducing oneself (easy) (webmaster) 469 909
79) Past tenses (bridg) 468 758
80) Passive voice (webmaster) 460 776
81) Present Simple vs. Past Simple (anonyme) 452 990
82) Questions : how to ask them (lucile83) 446 874
83) General Test II / End of high school / Beginning of universi (webmaster) 445 191
84) IN, ON, AT or TO? (webmaster) 443 605
85) Relative pronouns (webmaster) 442 653
86) Comparative of superiority (lucile83) 435 763
87) How to pronounce the final -ED? (past simple) (webmaster) 435 097
88) Relative clauses (webmaster) 422 125
89) Sounds: [h] (webmaster) 418 753
90) Comparative (anonyme) 411 104
91) A/an/Ø (bridg) 396 687
92) Future simple (lucile83) 394 463
93) This / That / These / Those (webmaster) 391 614
94) Past simple (anonyme) 390 761
95) Conditional (webmaster) 390 230
96) Passive voice (anonyme) 388 911
97) Comparing (webmaster) 387 308
98) Can / could/ may/ might (woodyrun) 378 168
99) Present perfect or past tense (anonyme) 374 850
100) Personal pronouns (anonyme) 370 832
101) Much, many, little and few (felin) 369 877
102) Some, any, no, enough, too/too much/too many (webmaster) 367 387
103) Preterite continuous (BE + -ING) (webmaster) 366 716
104) Genitive case (bridg) 366 431
105) Confusing words - Placement test (bridg) 364 074
106) Irregular verbs (webmaster) 362 507
107) Numbers from 1 to 10 (lucile83) 360 755
108) Past perfect simple, past perfect continuous (anonyme) 360 329
109) Present continuous or present simple (webmaster) 358 893
110) Present perfect or preterite? (anonyme) 353 756
111) Comparative Adjectives (bridg) 351 465
112) Simple Past : regular verbs (anonyme) 351 225
113) Who, Whom, Which, or Whose? (anonyme) 347 571
114) Past simple (video) (lucile83) 346 458
115) Past simple or past continuous (lucile83) 338 283
116) What time is it? (webmaster) 336 844
117) Modals (tinou) 335 729
118) While / When (anonyme) 335 515
119) Modal: may/might (lucile83) 333 384
120) Cardinal and ordinal numbers (anonyme) 327 824
121) Possessive adjectives and pronouns (woodyrun) 323 007
122) The superlative (anonyme) 321 976
123) How to talk about the weather (lili73) 320 796
124) Since and for (lucile83) 317 607
125) Flags (webmaster) 316 806
126) Irregular verbs (bridg) 315 128
127) Prepositions - in, on, at (anonyme) 313 596
128) Pronouns (woodyrun) 310 935
129) Tenses (anonyme) 310 298
130) Placement test 3 (webmaster) 309 821
131) Order of adjectives (webmaster) 305 517
132) Could/Couldn't (laure95) 305 147
133) Comparative (anonyme) 303 628
134) Adjectives and prepositions (lucile83) 303 627
135) Agreement Tags (webmaster) 303 359
136) Asking questions (webmaster) 302 243
137) Present perfect OR simple past? (bridg) 297 724
138) Questions in the past tense (lucile83) 296 543
139) Superlative Adjectives (bridg) 294 778
140) Uncountable nouns (webmaster) 294 625
141) Object pronouns (bridg) 293 142
142) Placement test 1 (lucile83) 291 777
143) Present simple (lucile83) 289 298
144) Prefer/rather (bridg) 288 423
145) Can/Must/Should (laure95) 287 819
146) Passive form (anonyme) 286 837
147) Must or Have to? (woodyrun) 285 886
148) The/an/nothing (bridg) 284 245
149) Past perfect (lili73) 284 196
150) To be (anonyme) 282 929
151) Vocabulary: asking and answering (here4u) 280 367
152) Can and can't (laure95) 278 529
153) Modal verbs (bridg) 276 725
154) Some / Any / no... (bridg) 269 505
155) Days of the week (bridg) 268 893
156) So / neither (anonyme) 263 691
157) Past simple (video) (lucile83) 263 103
158) Used to (bridg) 259 979
159) Past tense (anonyme) 258 650
160) Vocabulary: on the phone (here4u) 258 633
161) Should / must (anonyme) 258 524
162) Find out a quantity (webmaster) 258 283
163) Superlative + and adjective (lucile83) 256 268
164) Present continuous (chnawa) 255 967
165) Articles : a / an / the / Ø (anonyme) 253 243
166) Numbers 1/100 (anonyme) 252 703
167) Comparative and superlative (anonyme) 252 512
168) Modal can (video) (lucile83) 252 380
169) Relatives pronouns (who, which, that...) (anonyme) 247 718
170) Vocabulary: at the restaurant (here4u) 245 571
171) A few, a little, few, little (anonyme) 243 959
172) Would rather / would prefer to (anonyme) 243 756
173) Present continuous and the Going to form (anonyme) 241 944
174) Comparatives (anonyme) 241 809
175) Have something done (anonyme) 239 264
176) Should/ have to/ must (anonyme) 238 408
177) The past (webmaster) 237 474
178) Future continuous and future perfect. (felin) 237 055
179) Used to/would (woodyrun) 236 239
180) How to ask a question in English (bridg) 234 024
181) I wish, if only (felin) 233 650
182) Pluperfect (webmaster) 233 196
183) Countable or Uncountable? (webmaster) 232 520
184) Present simple or continuous (bridg) 230 731
185) Should / shouldn't (anonyme) 230 653
186) Some / any (younes91) 230 365
187) Adjectives - ing and ed (felin) 228 241
188) Hypothesis (webmaster) 227 363
189) Auxiliary BE (lucile83) 225 938
190) Articles a/an/the/0 (bridg) 225 776
191) Article The or nothing (anonyme) 225 349
192) Present perfect with Ever - never - (anonyme) 224 866
193) Present continuous OR Present simple? (bridg) 224 760
194) Must or mustn't (laure95) 223 470
195) Simple Preterite OR Preterite (BE+ing) (webmaster) 222 360
196) Present perfect (bridg) 218 929
197) To / in order to / so as to / so that (irish21) 218 854
198) What time is it ? (anonyme) 217 177
199) Indirect speech (bridg) 215 195
200) Comparison (komiks) 214 404
