Another site:
AllTop 200 most popular tests to learn English...
1) Test de niveau anglais (webmaster) 6 770 891
2) Placement test : grammar for beginners (lucile83) 5 979 428
3) A/AN (webmaster) 5 357 081
4) Auxiliary BE (webmaster) 3 220 383
5) Present continuous (webmaster) 2 993 883
6) Present simple (webmaster) 2 897 726
7) Present simple (webmaster) 2 592 618
8) Present continuous (webmaster) 2 423 893
9) Adjectives (webmaster) 2 091 149
10) A/an (anonyme) 2 010 862
11) Present perfect simple (webmaster) 1 634 920
12) Vocabulary - Placement test (bridg) 1 617 131
13) Preterite (webmaster) 1 615 009
14) Short placement test (webmaster) 1 441 649
15) Preterite (webmaster) 1 439 586
16) To be (bridg) 1 403 457
17) What time is it? (webmaster) 1 346 585
18) Present perfect (webmaster) 1 338 865
19) The alphabet in English (webmaster) 1 318 759
20) Adjectives (lucile83) 1 213 381
21) What time is it? (webmaster) 1 203 896
22) Numbers (webmaster) 1 187 212
23) 'A' ou 'An' (anonyme) 1 171 887
24) Two presents: present continuous, present simple (webmaster) 1 145 983
25) To be (bridg) 1 143 464
26) Comparatives / Superlatives (webmaster) 1 095 575
27) Numbers (webmaster) 1 068 435
28) CAN / MUST (webmaster) 1 056 939
29) THE/ A / AN / nothing (webmaster) 1 029 067
30) Comparatives (webmaster) 1 005 677
31) Family life (bridg) 998 739
32) Numbers > 100 (webmaster) 984 974
33) Future (going to/will/present continuous) (anonyme) 960 615
34) Plural (webmaster) 953 968
35) Superlatives (webmaster) 873 258
36) Adjectives (anonyme) 872 910
37) Simple present (bridg) 851 749
38) Spelled words N°1 (bridg) 848 336
39) Placement test beginners: Check your spelling (lucile83) 829 248
40) Introducing oneself (webmaster) 826 072
41) Adverbs of frequency (lucile83) 814 206
42) Family (bridg) 783 054
43) General test-End of high school / Beginning of university (webmaster) 780 941
44) Present simple (lucile83) 776 532
45) Frequency adverbs (webmaster) 776 393
46) Present BE + Ving (bridg) 762 838
47) Genitive (webmaster) 722 183
48) Family tree (anonyme) 717 924
49) Preterite: simple or continuous? (webmaster) 714 240
50) Passive form (lucile83) 709 733
51) Placement test (beginners) (lili73) 699 275
52) Past simple or present perfect (lucile83) 690 062
53) Future (webmaster) 674 809
54) 2 Preterites (webmaster) 659 789
55) Present perfect simple (bridg) 656 016
56) Preterite (webmaster) 617 338
57) List of 200 irregular verbs and audio (bridg) 614 261
58) Modals (webmaster) 611 670
59) Spelled words N°2 (bridg) 607 811
60) Height (webmaster) 605 447
61) Modals (webmaster) 601 896
62) Articles a / an / the (lucile83) 596 701
63) Plural forms (bridg) 575 899
64) Nationalities (webmaster) 573 115
65) Past continuous / Past simple (anonyme) 560 435
66) Irregular plurals (bridg) 552 227
67) Two presents: simple and continuous (webmaster) 548 282
68) Preterite (bridg) 547 495
69) Vocabulary: greeting people (here4u) 536 358
70) Superlatives (frapedur) 533 734
71) Give your opinion (bridg) 530 634
72) Adverbs of Frequency (bridg) 515 967
73) Present simple or continuous (lucile83) 506 270
74) Present perfect / preterite ? (anonyme) 505 095
75) Possessive case (anonyme) 479 483
76) Countries & nationalities (bridg) 471 984
77) 'The' or nothing? (webmaster) 470 341
78) Introducing oneself (easy) (webmaster) 469 976
79) Past tenses (bridg) 469 001
80) Passive voice (webmaster) 460 956
81) Present Simple vs. Past Simple (anonyme) 453 365
82) Questions : how to ask them (lucile83) 447 023
83) General Test II / End of high school / Beginning of universi (webmaster) 445 261
84) IN, ON, AT or TO? (webmaster) 443 778
85) Relative pronouns (webmaster) 442 771
86) Comparative of superiority (lucile83) 436 063
87) How to pronounce the final -ED? (past simple) (webmaster) 435 255
88) Relative clauses (webmaster) 422 210
89) Sounds: [h] (webmaster) 418 813
90) Comparative (anonyme) 411 340
91) A/an/Ø (bridg) 396 877
92) Future simple (lucile83) 394 580
93) This / That / These / Those (webmaster) 391 693
94) Past simple (anonyme) 391 340
95) Conditional (webmaster) 390 381
96) Passive voice (anonyme) 389 040
97) Comparing (webmaster) 387 376
98) Can / could/ may/ might (woodyrun) 378 276
99) Present perfect or past tense (anonyme) 375 063
100) Personal pronouns (anonyme) 370 900
101) Much, many, little and few (felin) 370 130
102) Some, any, no, enough, too/too much/too many (webmaster) 367 473
103) Preterite continuous (BE + -ING) (webmaster) 366 929
104) Genitive case (bridg) 366 558
105) Confusing words - Placement test (bridg) 364 143
106) Irregular verbs (webmaster) 362 576
107) Numbers from 1 to 10 (lucile83) 360 819
108) Past perfect simple, past perfect continuous (anonyme) 360 413
109) Present continuous or present simple (webmaster) 358 955
110) Present perfect or preterite? (anonyme) 354 087
111) Comparative Adjectives (bridg) 351 595
112) Simple Past : regular verbs (anonyme) 351 332
113) Who, Whom, Which, or Whose? (anonyme) 347 698
114) Past simple (video) (lucile83) 346 617
115) Past simple or past continuous (lucile83) 338 584
116) What time is it? (webmaster) 336 915
117) While / When (anonyme) 336 011
118) Modals (tinou) 335 780
119) Modal: may/might (lucile83) 333 458
120) Cardinal and ordinal numbers (anonyme) 327 877
121) Possessive adjectives and pronouns (woodyrun) 323 152
122) The superlative (anonyme) 322 198
123) How to talk about the weather (lili73) 320 801
124) Since and for (lucile83) 317 702
125) Flags (webmaster) 316 858
126) Irregular verbs (bridg) 315 199
127) Prepositions - in, on, at (anonyme) 313 622
128) Pronouns (woodyrun) 311 306
129) Tenses (anonyme) 310 437
130) Placement test 3 (webmaster) 309 859
131) Order of adjectives (webmaster) 305 662
132) Could/Couldn't (laure95) 305 263
133) Comparative (anonyme) 303 693
134) Adjectives and prepositions (lucile83) 303 660
135) Agreement Tags (webmaster) 303 396
136) Asking questions (webmaster) 302 342
137) Present perfect OR simple past? (bridg) 297 790
138) Questions in the past tense (lucile83) 296 595
139) Superlative Adjectives (bridg) 294 928
140) Uncountable nouns (webmaster) 294 729
141) Object pronouns (bridg) 293 400
142) Placement test 1 (lucile83) 291 880
143) Present simple (lucile83) 289 447
144) Prefer/rather (bridg) 288 483
145) Can/Must/Should (laure95) 287 972
146) Passive form (anonyme) 287 216
147) Must or Have to? (woodyrun) 285 999
148) Past perfect (lili73) 284 490
149) The/an/nothing (bridg) 284 358
150) To be (anonyme) 282 990
151) Vocabulary: asking and answering (here4u) 280 375
152) Can and can't (laure95) 278 768
153) Modal verbs (bridg) 276 781
154) Some / Any / no... (bridg) 269 594
155) Days of the week (bridg) 268 922
156) So / neither (anonyme) 263 820
157) Past simple (video) (lucile83) 263 146
158) Used to (bridg) 259 997
159) Past tense (anonyme) 258 694
160) Should / must (anonyme) 258 652
161) Vocabulary: on the phone (here4u) 258 642
162) Find out a quantity (webmaster) 258 297
163) Superlative + and adjective (lucile83) 256 341
164) Present continuous (chnawa) 256 329
165) Articles : a / an / the / Ø (anonyme) 253 741
166) Numbers 1/100 (anonyme) 252 815
167) Comparative and superlative (anonyme) 252 810
168) Modal can (video) (lucile83) 252 413
169) Relatives pronouns (who, which, that...) (anonyme) 247 719
170) Vocabulary: at the restaurant (here4u) 245 578
171) A few, a little, few, little (anonyme) 244 046
172) Would rather / would prefer to (anonyme) 243 806
173) Comparatives (anonyme) 242 368
174) Present continuous and the Going to form (anonyme) 242 014
175) Have something done (anonyme) 239 303
176) Should/ have to/ must (anonyme) 238 492
177) The past (webmaster) 237 495
178) Future continuous and future perfect. (felin) 237 094
179) Used to/would (woodyrun) 236 326
180) How to ask a question in English (bridg) 234 145
181) I wish, if only (felin) 233 689
182) Pluperfect (webmaster) 233 314
183) Countable or Uncountable? (webmaster) 232 569
184) Present simple or continuous (bridg) 230 735
185) Should / shouldn't (anonyme) 230 731
186) Some / any (younes91) 230 563
187) Adjectives - ing and ed (felin) 228 289
188) Hypothesis (webmaster) 227 421
189) Auxiliary BE (lucile83) 225 990
190) Articles a/an/the/0 (bridg) 225 805
191) Article The or nothing (anonyme) 225 393
192) Present perfect with Ever - never - (anonyme) 225 042
193) Present continuous OR Present simple? (bridg) 224 804
194) Must or mustn't (laure95) 223 652
195) Simple Preterite OR Preterite (BE+ing) (webmaster) 222 385
196) Present perfect (bridg) 218 975
197) To / in order to / so as to / so that (irish21) 218 973
198) What time is it ? (anonyme) 217 231
199) Indirect speech (bridg) 215 289
200) Comparison (komiks) 214 830
