Another site:
AllTop 200 most popular tests to learn English...
1) Test de niveau anglais (webmaster) 6 798 382
2) Placement test : grammar for beginners (lucile83) 6 020 451
3) A/AN (webmaster) 5 383 138
4) Auxiliary BE (webmaster) 3 232 923
5) Present continuous (webmaster) 3 010 379
6) Present simple (webmaster) 2 941 420
7) Present simple (webmaster) 2 606 967
8) Present continuous (webmaster) 2 450 915
9) Adjectives (webmaster) 2 099 075
10) A/an (anonyme) 2 025 899
11) Present perfect simple (webmaster) 1 659 925
12) Preterite (webmaster) 1 646 955
13) Vocabulary - Placement test (bridg) 1 624 066
14) Preterite (webmaster) 1 459 142
15) Short placement test (webmaster) 1 447 792
16) To be (bridg) 1 411 952
17) Present perfect (webmaster) 1 357 774
18) What time is it? (webmaster) 1 353 819
19) The alphabet in English (webmaster) 1 326 615
20) Adjectives (lucile83) 1 223 077
21) What time is it? (webmaster) 1 215 013
22) Numbers (webmaster) 1 191 622
23) 'A' ou 'An' (anonyme) 1 183 136
24) Two presents: present continuous, present simple (webmaster) 1 155 420
25) To be (bridg) 1 150 320
26) Comparatives / Superlatives (webmaster) 1 116 693
27) Numbers (webmaster) 1 075 600
28) CAN / MUST (webmaster) 1 061 956
29) THE/ A / AN / nothing (webmaster) 1 039 794
30) Comparatives (webmaster) 1 010 275
31) Family life (bridg) 1 005 409
32) Numbers > 100 (webmaster) 989 273
33) Future (going to/will/present continuous) (anonyme) 969 277
34) Plural (webmaster) 961 581
35) Adjectives (anonyme) 878 823
36) Superlatives (webmaster) 878 615
37) Simple present (bridg) 858 287
38) Spelled words N°1 (bridg) 854 359
39) Placement test beginners: Check your spelling (lucile83) 832 411
40) Introducing oneself (webmaster) 829 808
41) Adverbs of frequency (lucile83) 822 994
42) Family (bridg) 788 373
43) Present simple (lucile83) 787 477
44) General test-End of high school / Beginning of university (webmaster) 786 326
45) Frequency adverbs (webmaster) 781 016
46) Present BE + Ving (bridg) 770 041
47) Passive form (lucile83) 738 514
48) Genitive (webmaster) 725 945
49) Family tree (anonyme) 722 559
50) Preterite: simple or continuous? (webmaster) 721 218
51) Placement test (beginners) (lili73) 706 028
52) Past simple or present perfect (lucile83) 700 853
53) Future (webmaster) 678 031
54) Present perfect simple (bridg) 669 159
55) 2 Preterites (webmaster) 665 936
56) Preterite (webmaster) 625 129
57) List of 200 irregular verbs and audio (bridg) 619 702
58) Modals (webmaster) 614 886
59) Spelled words N°2 (bridg) 612 387
60) Modals (webmaster) 611 208
61) Height (webmaster) 608 347
62) Articles a / an / the (lucile83) 596 998
63) Plural forms (bridg) 581 012
64) Nationalities (webmaster) 576 976
65) Past continuous / Past simple (anonyme) 573 631
66) Irregular plurals (bridg) 556 885
67) Preterite (bridg) 554 775
68) Two presents: simple and continuous (webmaster) 552 013
69) Superlatives (frapedur) 546 285
70) Vocabulary: greeting people (here4u) 536 810
71) Give your opinion (bridg) 534 821
72) Adverbs of Frequency (bridg) 519 401
73) Present simple or continuous (lucile83) 517 123
74) Present perfect / preterite ? (anonyme) 515 423
75) Possessive case (anonyme) 483 184
76) Countries & nationalities (bridg) 476 071
77) Past tenses (bridg) 473 732
78) 'The' or nothing? (webmaster) 472 879
79) Introducing oneself (easy) (webmaster) 472 570
80) Passive voice (webmaster) 466 559
81) Present Simple vs. Past Simple (anonyme) 464 936
82) Questions : how to ask them (lucile83) 450 305
83) General Test II / End of high school / Beginning of universi (webmaster) 448 179
84) Relative pronouns (webmaster) 448 112
85) IN, ON, AT or TO? (webmaster) 447 899
86) How to pronounce the final -ED? (past simple) (webmaster) 443 387
87) Comparative of superiority (lucile83) 442 523
88) Relative clauses (webmaster) 425 365
89) Sounds: [h] (webmaster) 421 218
90) Comparative (anonyme) 416 947
91) Past simple (anonyme) 405 123
92) A/an/Ø (bridg) 400 715
93) Future simple (lucile83) 399 891
94) Conditional (webmaster) 394 284
95) This / That / These / Those (webmaster) 394 079
96) Passive voice (anonyme) 393 267
97) Comparing (webmaster) 389 640
98) Can / could/ may/ might (woodyrun) 382 168
99) Present perfect or past tense (anonyme) 381 050
100) Much, many, little and few (felin) 376 707
101) Preterite continuous (BE + -ING) (webmaster) 373 126
102) Personal pronouns (anonyme) 372 096
103) Genitive case (bridg) 370 309
104) Some, any, no, enough, too/too much/too many (webmaster) 369 521
105) Irregular verbs (webmaster) 365 768
106) Confusing words - Placement test (bridg) 365 573
107) Numbers from 1 to 10 (lucile83) 363 152
108) Past perfect simple, past perfect continuous (anonyme) 361 734
109) Present continuous or present simple (webmaster) 361 158
110) Present perfect or preterite? (anonyme) 361 153
111) Simple Past : regular verbs (anonyme) 357 261
112) Comparative Adjectives (bridg) 353 699
113) Past simple (video) (lucile83) 351 137
114) Who, Whom, Which, or Whose? (anonyme) 350 968
115) Past simple or past continuous (lucile83) 348 337
116) While / When (anonyme) 343 244
117) What time is it? (webmaster) 339 815
118) Modals (tinou) 338 165
119) Modal: may/might (lucile83) 335 428
120) Cardinal and ordinal numbers (anonyme) 330 431
121) The superlative (anonyme) 329 728
122) Possessive adjectives and pronouns (woodyrun) 325 754
123) How to talk about the weather (lili73) 321 117
124) Since and for (lucile83) 320 879
125) Flags (webmaster) 319 179
126) Irregular verbs (bridg) 317 817
127) Pronouns (woodyrun) 316 865
128) Prepositions - in, on, at (anonyme) 314 998
129) Tenses (anonyme) 314 660
130) Placement test 3 (webmaster) 311 700
131) Could/Couldn't (laure95) 308 105
132) Order of adjectives (webmaster) 307 946
133) Comparative (anonyme) 306 028
134) Agreement Tags (webmaster) 305 374
135) Adjectives and prepositions (lucile83) 304 990
136) Asking questions (webmaster) 304 389
137) Present perfect OR simple past? (bridg) 299 587
138) Questions in the past tense (lucile83) 299 259
139) Object pronouns (bridg) 297 818
140) Superlative Adjectives (bridg) 297 557
141) Uncountable nouns (webmaster) 297 373
142) Passive form (anonyme) 296 309
143) Placement test 1 (lucile83) 294 249
144) Can/Must/Should (laure95) 293 691
145) Past perfect (lili73) 293 637
146) Present simple (lucile83) 293 455
147) Prefer/rather (bridg) 291 303
148) Must or Have to? (woodyrun) 289 788
149) The/an/nothing (bridg) 286 748
150) Can and can't (laure95) 284 630
151) To be (anonyme) 283 891
152) Vocabulary: asking and answering (here4u) 280 587
153) Modal verbs (bridg) 278 427
154) Some / Any / no... (bridg) 276 254
155) Days of the week (bridg) 269 366
156) Present continuous (chnawa) 265 204
157) Past simple (video) (lucile83) 264 991
158) So / neither (anonyme) 264 916
159) Used to (bridg) 264 685
160) Should / must (anonyme) 261 592
161) Past tense (anonyme) 260 528
162) Articles : a / an / the / Ø (anonyme) 260 099
163) Comparative and superlative (anonyme) 259 202
164) Find out a quantity (webmaster) 259 124
165) Vocabulary: on the phone (here4u) 258 970
166) Superlative + and adjective (lucile83) 258 624
167) Numbers 1/100 (anonyme) 254 516
168) Comparatives (anonyme) 254 187
169) Modal can (video) (lucile83) 254 073
170) Relatives pronouns (who, which, that...) (anonyme) 247 997
171) A few, a little, few, little (anonyme) 247 483
172) Would rather / would prefer to (anonyme) 245 805
173) Vocabulary: at the restaurant (here4u) 245 797
174) Present continuous and the Going to form (anonyme) 243 970
175) Should/ have to/ must (anonyme) 242 353
176) Have something done (anonyme) 240 405
177) Used to/would (woodyrun) 239 026
178) Future continuous and future perfect. (felin) 238 310
179) The past (webmaster) 238 278
180) Countable or Uncountable? (webmaster) 237 058
181) How to ask a question in English (bridg) 236 974
182) Some / any (younes91) 235 579
183) Pluperfect (webmaster) 235 247
184) I wish, if only (felin) 234 672
185) Should / shouldn't (anonyme) 232 907
186) Present simple or continuous (bridg) 230 975
187) Adjectives - ing and ed (felin) 230 545
188) Hypothesis (webmaster) 229 471
189) Must or mustn't (laure95) 228 585
190) Auxiliary BE (lucile83) 227 054
191) Articles a/an/the/0 (bridg) 226 891
192) Present perfect with Ever - never - (anonyme) 226 866
193) Article The or nothing (anonyme) 226 755
194) Present continuous OR Present simple? (bridg) 226 232
195) Comparison (komiks) 223 503
196) Simple Preterite OR Preterite (BE+ing) (webmaster) 223 419
197) To / in order to / so as to / so that (irish21) 222 196
198) Present perfect (bridg) 220 190
199) Indirect speech (bridg) 219 308
200) What time is it ? (anonyme) 218 264
